Tuning 7747

[Romans, Mark]

I think the Knock sensor might not be as good, but should still work.
To check a GM one we use a special J-Tool!   A plunger handle! Just
drop it a couple of inches onto the block and you should see knock signal,
if
that works it should work on your app too.
Mark
----- Original Message -----
From: <WEG1192 at aol.com>
To: <gmecm at diy-efi.org>
Sent: Monday, September 18, 2000 9:24 PM
Subject: Re: Tuning 7747


> Carl,
>
> So the ECM thinks it is turning on EGR and leans down the mixture in the
> programming? Thanks, I'll try and disable the EGR and see how that effects
> things. I've got idle at 128 BLM and 128 intergrator in both park and
drive.
> Man, does it run smooth then. I also increased the timing by 20% at low
and
> high cruise and it really pulls now, but I'm still running 150-160 BLMs at
> 128 integrator. One more question though. Since this is on an AMC block,
and
> the knock sensor is supposedly designed to work only on specific blocks, I
> can't use the ESC system as a tuning aid to listen to knock for me. Do I
just
> have to use performance measurements instead? For ex. take the advance as
> high as I can go before audible knock and then back it off until
performance
> drops or MAP voltage rises at a given RPM and TPS? I'm fixing to make a
run
> with the TPS% for EGR set to 100 and 99 so it should be disabled now. Once
I
> get it tuned without EGR, then I'll go back and see if I can get EGR back
in
> the loop.
> Thanks again.
> --------------------------------------------------------------------------
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